EP3270461B1 - Breitbandantennensystem für ein fahrzeug - Google Patents

Breitbandantennensystem für ein fahrzeug Download PDF

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Publication number
EP3270461B1
EP3270461B1 EP16382335.4A EP16382335A EP3270461B1 EP 3270461 B1 EP3270461 B1 EP 3270461B1 EP 16382335 A EP16382335 A EP 16382335A EP 3270461 B1 EP3270461 B1 EP 3270461B1
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EP
European Patent Office
Prior art keywords
antenna system
vehicle
radiating element
broadband antenna
ground plane
Prior art date
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Application number
EP16382335.4A
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English (en)
French (fr)
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EP3270461A1 (de
Inventor
Enrique Martinez Ortigosa
Víctor DIAZ JIMENEZ
Ramiro Quintero Illera
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Advanced Automotive Antennas SL
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Advanced Automotive Antennas SL
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Publication date
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Priority to EP16382335.4A priority Critical patent/EP3270461B1/de
Priority to US15/649,156 priority patent/US10305162B2/en
Publication of EP3270461A1 publication Critical patent/EP3270461A1/de
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Publication of EP3270461B1 publication Critical patent/EP3270461B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
    • H01Q1/1214—Supports; Mounting means for fastening a rigid aerial element through a wall
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths

Definitions

  • the present invention relates to a new design of an antenna system, specifically designed for being installed on a vehicle, and preferably, for operating on the LTE network.
  • This new antenna is also designed for being capable of integrating different antennas to provide additional communication services.
  • One object of this invention is to provide an antenna system having a broad bandwidth behavior, which is capable of offering a high efficiency, and which is capable of reducing the size of existing antenna systems for vehicles.
  • Another object of this invention is to provide an antenna system capable of covering all the 4G frequency bands, ensuring that the antenna maintains the desired behavior at the whole band of operation, and in particular, at the lower LTE frequency range 700-800MHz.
  • Another object of this invention is to provide an antenna system capable of being integrated with other vehicle radio-communication services in a single compact shark fin antenna module.
  • antennas mounted in different locations of the vehicle.
  • these antennas were broadband monopoles located at the rear window and/or on the roof.
  • Figure 1a shows a lateral view of a vehicle having a conventional antenna 12 mounted on the roof of the vehicle.
  • Figure 1b shows a detailed view of the antenna 12 shown in Figure 1a , where the antenna 12 is fed by a coaxial cable 14 and the roof acts as a ground plane 13.
  • the automotive industry is tending to integrate in a single module all the communication modules specifically designed for providing one communication service, such as telephony, AM/FM radio, satellite digital audio radio services (SDARS), global navigation satellite system (GNSS), or digital audio broadcasting (DAB).
  • telephony AM/FM radio
  • SDARS satellite digital audio radio services
  • GNSS global navigation satellite system
  • DAB digital audio broadcasting
  • This global antenna module is subject to meet current customer tastes. For that, it would be desirable to reduce the size of traditional antenna systems in order to be able to integrate them in a module that can maintain the streamlined appearance of the vehicle. However, reducing the size of an antenna system affects its performance.
  • US2010013719 discloses a multiband antenna with a triangular monopole radiator that is coplanar with a ground plane, including a grounded folded parasitic element partly surrounding the triangular monopole radiator.
  • the ground plane has a reduced size, such that its width parallel to the base of the triangular radiator is larger than its length.
  • US2014085159 and US2012001815 also disclose multiband antennas with a monopole and a grounded folded parasitic element.
  • the monopoles are not triangular.
  • the present invention overcomes the above mentioned drawbacks by providing a new design of a broadband antenna system for a vehicle, which having a reduced size is capable of providing a high bandwidth and a high efficiency, also at all LTE frequency bands.
  • the broadband antenna system for a vehicle comprises the features of claim 1.
  • the first angle of the radiating element has an aperture preferably ranging from 80° to 156°, having an optimum range from 120° to 156° and with a optimum aperture value of 150°.
  • the radiating element has a length measured from the first side to the first angle lower than 1/10 ⁇ , and a width measured as the length of the first side of the radiating element lower than 1/8 ⁇ , being ⁇ the lowest frequency of the antenna's band operation.
  • the first portion of the conductive element is bigger than 1/8 ⁇ , being ⁇ the lowest frequency of the antenna's band operation.
  • the antenna system modifies the electric length of the ground plane, modifying its frequency behaviour.
  • This modified frequency behaviour brings the resonance of the ground plane to lower frequencies, surging a new resonant frequency, which in case of the radiating element operates at the LTE frequency band of operation, a new resonant frequency surges at the LTE 700 band.
  • the invention provides a broadband antenna system having high efficient characteristics, such as:
  • a shark fin antenna comprises the broadband antenna system of the invention and a cover for enclosing said antenna system.
  • FIG. 2 shows a broadband antenna system 1 for a vehicle, according to a first embodiment of the invention.
  • the antenna system 1 comprises a ground plane 2, first and second portion areas 3a, 3b of a dielectric substrate 3, a radiating element 4 for operating at a LTE frequency band, a conductive element 5, and a feeding 8 and a grounding point 9.
  • the ground plane 2 has a rectangular configuration, having major 2a and minor 2b sides.
  • the ground plane 2 is disposed on the second portion area 3b of the substrate 3, while the radiating element 4 is disposed on the first portion area 3a of the substrate 3.
  • the ground plane 2 and the radiating element 4 are on the same substrate 3 and can be formed into a single body, where the second portion area 3b of the substrate 3 allocates the ground plane 2, and the first portion area 3a of the substrate 3 allocates the radiating element 4. Further, the first portion area 3a of the substrate 3 allocates the conductive element 5, the grounding point 9, and the feeding element 8.
  • the first portion area 3a is disposed on a corner of the substrate 3 and the second portion area 3b is disposed on the rest of the substrate 3.
  • the grounding point 9 is disposed at the upper extreme of the first portion area 3a of the substrate 3, and preferably at the interface between the first 3a and the second portion area 3b of the substrate 3.
  • the grounding point 9 is coupled to the ground plane 2.
  • the feeding element 8 is adapted to feed the radiating element 4, and is electromagnetically coupled with said radiating element 4.
  • the radiating element 4 has at least three angles and three sides, a first side 7 is aligned with the upper minor side 2b of the ground plane 2, and a first angle 6 whose vertex is the closest point to the ground plane 2. Further, the first angle 6 is opposite to the midpoint of the first side 7, wherein the first side 7 is the longer side of the radiating element 4.
  • the first angle 6 has an aperture lower than 156°, 150° in the embodiment.
  • the radiating element 4 has a substantially triangular configuration.
  • the conductive element 5 is disposed on the first portion area 3a of the substrate 3, and is electrically isolated from the radiating element 4.
  • the conductive element 5 has a first portion 5' extending between the upper side of the first portion area 3a of the substrate 3 and the radiating element 4, and a second portion 5" extending between the left side of the first portion area 3a of the substrate 3 and the radiating element 4.
  • the first portion 5' of the conductive element 5 is bigger than 1/8 ⁇ , being ⁇ the lowest frequency of the at least one LTE frequency band of operation of the broadband antenna system 1.
  • the first portion 5' of the conductive element 5 is preferably spaced 50 ⁇ m from the radiating element 4.
  • one extreme of the conductive element 5 is coupled to the ground plane 2 through the grounding point 9, and the other extreme is open, having a space-filling curve configuration.
  • the space-filling curve configuration allows reducing the length of the conductive element 5.
  • space-filling curve should be understood as defined in US7868834B2 , in particular, in paragraphs [0061] - [0063], and Figure 10 .
  • One extreme of the conductive element 5 of the broadband antenna system described herein may be shaped as a space-filling curve.
  • Figure 3 shows examples of space-filling curves.
  • Space-filling curves 1501 through 1514 are examples of space filling curves for antenna designs. Space-filling curves fill the surface or volume where they are located in an efficient way while keeping the linear properties of being curves.
  • a space-filling curve is a non-periodic curve including a number of connected straight segments smaller than a fraction of the operating free-space wave length, where the segments are arranged in such a way that no adjacent and connected segments form another longer straight segment and wherein none of said segments intersect each other.
  • an antenna geometry forming a space-filling curve may include at least five segments, each of the at least five segments forming an angle with each adjacent segment in the curve, at least three of the segments being shorter than one-tenth of the longest free-space operating wavelength of the antenna.
  • Each angle between adjacent segments is less than 180° and at least two of the angles between adjacent sections are less than 115°, and at least two of the angles are not equal.
  • the example curve fits inside a rectangular area, the longest side of the rectangular area being shorter than one-fifth of the longest free-space operating wavelength of the antenna.
  • the electric length of the ground plane (Lgp) is modified by the electric length (Lce) of the conductive element 5, which acts as an extensor of the ground plane.
  • the sum of the electric length (Lgp) of a major side (2a) of the ground plane 2 and the electric length (Lce) of the conductive element 5 ranges from 0.18 ⁇ to 0.22 ⁇ , being ⁇ the lowest frequency of the at least one LTE frequency band of operation of the antenna system.
  • Figures 4-6 respectively show graphics of the efficiency, the average gain, and maximum gain of the broadband antenna system embodiment shown in Figure 2 .
  • the antenna system covers LTE frequency bands ranging from 700 MHz to 960 MHz with an efficiency greater than -2dB, an average gain greater than - 1,5dBi and maximum gain greater than 1dBi.
  • the broadband antenna system satisfies customer requirements covering the lower 4G frequency bands (LTE 700 / LTE 800) with good directivity and minor power losses (high efficiency) with better frequency response than current mobile phone antennas, which have 6 dB of losses.
  • the antenna system covers the LTE frequency band ranging from 1400 MHz to 1500 MHz with an efficiency greater than -3dB, an average gain greater than -3dBi, and maximum gain greater than 1dBi.
  • the broadband antenna system provides a high-efficiency antenna.
  • Figures 4-6 also show that the antenna system at the LTE frequency band ranging from 1700 to 2200 MHz has an average efficiency greater than -2,5dB, an average gain greater than -2,5dBi, and maximum gain greater than 0dBi. Gain values of the antenna system fulfil antenna's specification of telephony operators.
  • the antenna system provides at the LTE frequency band ranging from 2500 to 2700 an efficiency greater than -2,5dB, an average gain greater than -2dBi, and maximum gain greater than 3dB.
  • the broadband antenna system provides very high directive and efficiency features at this range.
  • the broadband antenna system 1 further comprises a matching network coupling the radiating element 4 with the feeding element 8.
  • the matching network may consist on a transmission line or a multiple section of transmission lines.
  • Figures 7-9 respectively show graphics of the broadband antenna system shown in Figure 2 provided with a matching network.
  • Figure 7 shows a graphic of the VSWR of the broadband antenna system provided with a matching network. As shown, the VSWR ⁇ 2.5 on the 95% of the bandwidth (700-960MHz, 1600- 2900MHz) of the antenna system.
  • the antenna offers good VSWR in the low frequency region and broadband behaviour in the high frequency region.
  • Figure 8 shows the real part of the impedance of a conventional broadband ⁇ /4 monopole in a dashed line, and the real part of the impedance of the broadband antenna system of the invention in a continuous line.
  • the value of the real part of the conventional monopole is lower than the desired 50Ohm at the lower frequencies.
  • the conductive element 5 of the broadband antenna system helps to increase the real part of the impedance at the lower frequencies of LTE, thus, allowing the communication at these frequencies.
  • the broadband antenna system increases the antenna's impedance and generates a double frequency response.
  • Figure 9 shows the VSWR measurement of a conventional broadband ⁇ /4 monopole in a dashed line, and the VSWR measurement of the broadband antenna system of the invention in a continuous line.
  • the new antenna system modifies the resonance frequency positions with respect to the conventional broadband monopole, getting an extended band of operation.
  • the matching network allows reducing the absolute magnitude of the imaginary part of the impedance in order to achieve a good VSWR result.
  • Figure 10 shows a non-claimed example of a broadband antenna system.
  • the ground plane 2 is preferably shaped having minor sides 2b of 0,19 ⁇ , and major sides 2a of 0,29 ⁇ , being ⁇ the lowest frequency of the LTE frequency band of operation of the antenna system 1, i.e. 700MHz.
  • the radiating element 4 has a length (Lre) measured from the first side 7 to the first angle 6 greater than 1/10 ⁇ , and a width (Wre) measured as the length of the first side 7 of the radiating element 4 greater than 1/8 ⁇ , being ⁇ the lowest frequency of the at least one LTE frequency band of operation of the antenna system 1.
  • Figure 11 shows several non-claimed variations of the broadband antenna system of Figure 2 , wherein the major sides 2a of the ground plane 2 (X axis of Figure 10 ) are progressively reduced.
  • the examples start having major sides 2a of 0,3 ⁇ (129mm at 700MHz), then major sides 2a are reduced to 0,25 ⁇ (20mm of reduction, i.e. having a length of 109mm), to 0,2 ⁇ (45mm of reduction, i.e. having a length of 84mm), to 0,08 ⁇ (95mm of reduction, i.e. having a length of 34mm), and to 0,001 ⁇ (125mm of reduction, i.e. having a length of 4mm).
  • Figure 12 shows the VSWR results of the different examples of ground planes of the antenna system shown in Figure 11 . As shown, when the ground plane is reduced greater than 60mm, the VSWR of the antenna system goes outside specification at lower frequencies, and thus limiting the minimum size of the ground plane of the antenna system.
  • Figure 13 shows several embodiments of the broadband antenna system of Figure 2 , wherein the minor sides 2b of the ground plane 2 (Y axis of Figure 10 ) are progressively reduced.
  • the embodiments start having minor sides 2b of 0,19 ⁇ (81mm at 700MHz), then minor sides 2b are reduced to 0.15 ⁇ (15mm of reduction, i.e. having a length of 66mm), to 0.085 ⁇ (45mm of reduction, i.e. having a length of 36mm)), to 0.003 ⁇ (80mm of reduction, i.e. having a length of 1mm).
  • minor sides 2b configuration are no a limiting parameter, since the broadband antenna system operates at all possible electric dimensions of minor sides 2b.
  • the radiating element 4 has at least three angles and three sides, wherein a first side 7 is aligned with the minor side 2b of the ground plane 2, and a first angle 6 is the angle whose apex is the closest point of the radiating element 4 to the ground plane 2.
  • the first side 7 is the longer side of the radiating element 4, and the first angle 6 is lower than 156°.
  • Figure 15 shows several embodiments of the broadband antenna system of Figure 2 , wherein the first angle 6 of the radiating element is progressively increased. This first angle makes that currents flowing through each side of the radiating element are decoupled enough from the ground plane, achieving thus an optimum performance.
  • the first angle of the radiating element has a direct effect on the real part of the impedance of the antenna system.
  • Figure 16 shows a graphic of the impedance of the broadband antenna systems of Figure 15 .
  • the real part of the impedance of the antenna is directly related with the efficiency of the antenna. If the real part of the impedance is lower than 5 ⁇ , the efficiency of the antenna will decrease extremely.
  • the first angle 6 has to be lower than 156° so as to the real part of the impedance of the antenna system is suitable for offering the mentioned antenna performance.
  • Figures 17a and 17b shows preferred embodiments in which the radiating element 4 has a substantially triangular configuration.
  • the radiating element 4 has straight sides 11.
  • the radiating element 4 has curved sides 11, in particular, concave-shaped sides.
  • the sum of the electric length (Lgp) of a major side 2a of the ground plane 2 and the electric length (Lce) of the conductive element 5 ranges from 0.18 ⁇ to 0.22 ⁇ , being ⁇ the lowest frequency of the at least one LTE frequency band of operation of the antenna system 1.
  • Figures 18 and 19 respectively show a graphic of the resonant frequency and the VSWR of the broadband antenna system of Figure 2 .
  • the antenna system achieves a VSWR greater than 1.25 and resonant frequencies ranging from 825 MHz to 1100MHz at the lower frequencies of the LTE frequency band of operation.
  • the broadband antenna system 1 further comprises at least one additional antenna selected from the group of: a satellite digital audio radio services (SDARS) antenna, a global navigation satellite system (GNSS) antenna, a digital audio broadcasting (DAB) antenna, and an AM/FM antenna.
  • SDARS satellite digital audio radio services
  • GNSS global navigation satellite system
  • DAB digital audio broadcasting
  • AM/FM AM/FM antenna
  • FIG 20 shows a shark fin antenna 15 comprising the broadband antenna system 1, according to another preferred embodiment.
  • the antenna system 1 is covered by a cover 16, and adapted to be attached to the vehicle.
  • the ground plane of the antenna system is an integral part of a vehicle, such as a roof, thus having larger dimensions than the previous embodiments.
  • the shark fin antenna 15 preferably comprises an upper 29 and a lower antenna module 30.
  • the upper antenna module 29 preferably comprises the first portion area 3a of the substrate 3, and first and second additional substrates 17', 17" for allocating the radiating element 4, the conductive element 5, a satellite digital audio radio services (SDARS) 18, a Global navigation satellite system (GNSS) antenna 19, a first 25 and a second 26 DSRC V2X (Dedicated Short-Range Communications Vehicle-to-infrastructure) antennas, and a RKE (Remote Keyless Entry) antenna 27.
  • SDARS satellite digital audio radio services
  • GNSS Global navigation satellite system
  • RKE Remote Keyless Entry
  • the radiating element 4, the conductive element 5, the first DSRC V2X antenna 25, and the RKE antenna 27 are preferably allocated in the first portion area 3a of the substrate 3; the second DSRC V2X antenna 26 is preferably allocated in the first additional substrate 17'; and the SDARS 18, and the GNSS antenna 19 is preferably allocated in the second additional substrate 17".
  • the lower antenna module 30 preferably comprises a third additional substrate 17'" for allocating a WiFi / Bluetooth antenna 23, a digital audio broadcasting (DAB) antenna connection 20, AM/FM antenna connections 21, and TV connections 28.
  • the third additional substrate 17'" serves as portable support for holding the upper 29 and lower antenna module 30. Further, the third additional substrate 17'" is supported by a base 22, which can be adapted to be fixed to a roof of a vehicle.
  • the shark fin antenna 15 integrates all these radio-communication services in a single and compact device.
  • the invention contemplates a vehicle having a roof and a broadband antenna system 1 as described, wherein the substrate 3 of said antenna system 1 is disposed substantially orthogonal to the ground.
  • the substrate 3 is enclosed by a cover 16 to form a shark fin antenna 15 for the vehicle.

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Claims (13)

  1. Breitbandantennensystem (1) für ein Fahrzeug, mit:
    einer Grundebene (2), die durch ein Rechteck mit einer langen (2a) und einer kurzen (2b) Seite umschrieben ist,
    einem dielektrischen Substrat (3) mit einer Hauptoberfläche mit einem ersten Abschnittsbereich (3a) und einem zweiten Abschnittsbereich (3b), wobei der zweite Abschnittsbereich die Grundebene (2) bereitstellt, wobei die Grundebene (2) zwei benachbarte Seiten des ersten Abschnittsbereichs (3a) umgibt;
    einem Abstrahlungselement (4) zum Betrieb bei zumindest einem Betriebsfrequenzband, wobei das Strahlungselement (4) im Wesentlichen eine dreieckige Form aufweist, die auf dem ersten Abschnittsbereich (3a) des Substrats (3) angeordnet ist, und zumindest drei Winkel und drei Seiten aufweist, wobei eine erste Seite (7) im Wesentlichen mit den kurzen Seiten (2b) des umschreibenden Rechtecks ausgerichtet ist, und ein erster Winkel (6) eine Spitze der dreieckigen Form aufweist, wobei die Spitze der nächste Punkt des Strahlungselements (4) zu der Grundebene (2) ist,
    einem Erdungspunkt (9), der an einem Ende des ersten Abschnittbereichs (3a) des Substrats (3) angeordnet ist und mit der Grundebene (2) gekoppelt ist, wobei das Ende neben der kurzen Seite (2b) des umschreibenden Rechtecks, die dem Strahlungselement (4) am nächsten liegt, angeordnet ist,
    einem Zuführelement (8), das mit dem Strahlungselement (4) durch die Spitze des ersten Winkels (6) elektromagnetisch gekoppelt ist, und
    einem leitenden Element (5), das von dem Strahlungselement (4) elektrisch isoliert ist, das auf den ersten Abschnittsbereich (3a) des Substrats (3) angeordnet ist und mit dem Erdungspunkt (9) gekoppelt ist, wobei das leitende Element (5) einen ersten Abschnitt (5') aufweist, der sich in eine Richtung einer der langen Seiten (2a) des umschreibenden Rechtecks erstreckt und sich zwischen dem Strahlungselement (4) und einer der Seiten des ersten Abschnittbereichs (3a) des Substrats (3) befindet,
    wobei jede lange Seite (2a) der Grundebene (2) eine elektrische Länge (Lgp) von zumindest 0,13λ aufweist, wobei λ die niedrigste Frequenz des Antennensystems (1) ist, und
    wobei der erste Winkel (6) des Strahlungselements (4) eine Öffnung kleiner als 156° aufweist,
    und wobei das leitende Element (5) eine elektrische Länge (Lce) aufweist, wobei die Summe der elektrischen Länge (Lgp) der langen Seite (2a) des umschreibenden Rechtecks der Grundebene (2) und der elektrischen Länge (Lce) des leitenden Elements (5) im Bereich von 0,15λ bis 0,22λ liegt, wobei λ die niedrigste Frequenz des Breitbandantennensystems (1) ist.
  2. Breitbandantennensystem (1) für ein Fahrzeug gemäß Anspruch 1, wobei das Strahlungselement (4) eine Länge (Lre) aufweist, die von der ersten Seite (7) zu dem ersten Winkel (6) gemessen wird, die kleiner als 1/10λ ist, und eine Breite (Wre), die als die Länge der ersten Seite (7) des Strahlungselements (4) gemessen wird, die kleiner als 1/8λ ist, wobei λ die niedrigste Frequenz des Antennensystems (1) ist.
  3. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei das leitende Element (5) von dem Strahlungselement (4) um zumindest 50 µm beabstandet ist.
  4. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei der erste Abschnitt (5') des leitenden Elements (5) größer als 1/8λ ist, wobei λ die niedrigste Frequenz des Antennensystems (1) ist.
  5. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei das Substrat (3) einen zweiten Abschnittsbereich (3b) aufweist, und wobei die Grundebene (2) auf dem zweiten Abschnittsbereich (3b) angeordnet ist.
  6. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei das Strahlungselement (4) gekrümmte Seiten (11) aufweist.
  7. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei das Strahlungselement (4) konkav geformte Seiten aufweist.
  8. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, weiterhin mit einem Abgleichsnetzwerk, das das Strahlungselement (4) mit dem Zuführelement (8) koppelt.
  9. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei das leitende Element (5) eine Form eines offenen Endes als eine raumfüllende Kurve aufweist.
  10. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, weiterhin mit zumindest einer zusätzlichen Antenne, die von der folgenden Gruppe ausgewählt wird: eine Antenne eines Satellitendigitalaudiofunktdienstes (SDARS), eine Antenne eines globalen Navigationssatellitensystems (GNSS), eine Antenne einer Digitalaudiorundsendung (DAB) und einer AM/FM-Antenne.
  11. Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, wobei das Betriebsfrequenzband das LTE-Betriebsfrequenzband ist, und λ der niedrigsten Frequenz des LTE-Bandes entspricht, welche 700 MHz ist.
  12. Breitbandantennensystem (1) für ein Fahrzeug gemäß Anspruch 11, wobei das LTE-Betriebsfrequenzband ein erstes Band im Bereich von 700 MHz bis 960 MHz, ein zweites Band von 1400 MHz bis 1500 MHz, ein drittes Band im Bereich von 1700 MHz bis 2200 MHz und ein viertes Band im Bereich von 2500 MHz bis 2700 MHz aufweist.
  13. Haifischflossenantenne (15) mit einem Breitbandantennensystem (1) für ein Fahrzeug gemäß einem der vorstehenden Ansprüche, weiterhin mit einer Abdeckung zum Aufnehmen von zumindest dem ersten Abschnittsbereich (3a) des Substrats (3) und wobei das Antennensystem (1) dazu angepasst ist, an dem Fahrzeug angebracht zu werden.
EP16382335.4A 2016-07-14 2016-07-14 Breitbandantennensystem für ein fahrzeug Active EP3270461B1 (de)

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US15/649,156 US10305162B2 (en) 2016-07-14 2017-07-13 Broadband antenna system for a vehicle

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CN108376831B (zh) * 2018-03-16 2023-11-24 广东通宇通讯股份有限公司 定向和双频全向组合式车载天线
EP3582323B1 (de) 2018-06-15 2021-12-29 Advanced Automotive Antennas, S.L.U. System mit dualbreitbandantenne für fahrzeuge
EP3866263A4 (de) * 2018-10-10 2022-06-08 Yokowo Co., Ltd. Antenne, antennenvorrichtung und fahrzeugmontierte antennenvorrichtung
KR102217182B1 (ko) * 2018-11-19 2021-02-18 삼성전자주식회사 차량용 통신 장치
KR102578394B1 (ko) * 2018-12-10 2023-09-14 엘지전자 주식회사 차량에 탑재되는 안테나 시스템
WO2021193094A1 (ja) 2020-03-25 2021-09-30 株式会社ヨコオ 車載用アンテナ装置

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EP3270461A1 (de) 2018-01-17
US20180019512A1 (en) 2018-01-18

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